/*
 * Copyright (C) 2010 Peter Dornbach.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.dornbachs.zebra;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;

public class ZebraImageButton extends ZebraButton {
	public static final int PADDING_NORMAL_PERCENT = 15;
	public static final int PADDING_PUSHED_PERCENT = 5;

   	public ZebraImageButton(
   			Context context,
   			AttributeSet attrs, 
   			int defStyle) {
   		super(context, attrs, defStyle);
		
		_originalBitmap = BitmapFactory.decodeResource(
				context.getResources(), R.drawable.palette);
		_paint = new Paint(Paint.DITHER_FLAG);
   	}

   	public ZebraImageButton(Context context, AttributeSet attrs) {
   		this(context, attrs, R.attr.zebraButtonStyle);
    }

   	public ZebraImageButton(Context context) {
   		this(context, null);
    }
   	
    protected void onDraw(Canvas canvas) {
    	int w = getWidth();
    	int h = getHeight();
    	int p = Math.min(w, h) *
    			(isPushedDown() ?
    			PADDING_PUSHED_PERCENT :
    			PADDING_NORMAL_PERCENT) / 100;
    	
    	w -= 2 * p;
    	h -= 2 * p;
    	if ((_resizedBitmap == null) ||
    			(_resizedBitmap.getWidth() != w) ||
    			(_resizedBitmap.getHeight() != h)) {
    		_resizedBitmap = Bitmap.createBitmap(w, h, _originalBitmap.getConfig());
    		DrawUtils.convertSizeFill(_originalBitmap, _resizedBitmap);
    	}
    	
    	canvas.drawBitmap(_resizedBitmap, p, p, _paint);
    }
    
    private Bitmap _originalBitmap;
    private Bitmap _resizedBitmap;
    private Paint _paint;
}
